Typewriting machine



E. J. DOWD TYPEWRITING MACHINE Feb. 17. 1925. 1,526,844

Filed May 12, 1924 Patented Feb. 17,1925.

UNITED STATES PATENT OFFICE.

BERNARD J. DOWD, 0F HAR-TFRD, CNNECTICUT, .ASSGNOR TE) ROYAL TYPEWRTTER COMPANY, INC., OF NEW' YORK. N. Y., A CORPORATION 0F NEW YORK.

TYPEWRTING MACHINE.

applicati@ sie@ may 1e, 1924. serial Nn. massi.

To all whom t may concern:

Be it lrnown that l, BERNARD J. Down, a citizen of the United States, and resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Type writing Machines, of which the following is a specification.

My invention relates to stops for the carriages of typewriting or similar machines and more particularly to tabulator stops.

It is essential that stops for tabulating purposes be strong enough to stand the shock of a sudden stoppage of the carriage after a considerable run; that they be thin enough to iit upon a rack bar which usually has grooves at letter space intervals; that they be easy to position and to remove; and that they may be readily held against acci` dental displacement.

Heretofore stops have been provided with separate springs or like devices for holding them in position, or some special form of rack bar has been adopted. All of these expediente have objections which militate against their general use. But if the usual form of stop without any holding means is employed, it is either difficult to place in position or is readily displaced accii dentally.

An object of my invention is to provide a simple one piece stop of strong construction but light weight which will have none of the defects enumerated.

Another object is to provide such a stop which has a holding means integral therewith.

Other objects will be apparent from the following detailed description and the appended claims.

In the drawings:

Figure l is a top plan view of a stop bar of usual construction with stops in position and the supports for the bar in section.

Figure 2 is a side view of a stop in position on the bar which is shown in section.

Figure 3 is a section of the stop on the line 3 3 of Figure 2.

Figure 4c is a perspective view of the stop.

Figure 5 is a section of the stop on the line 5 5 of Figure 2.

Figure 6 is a side view of a stop having two integral resilient holding fingers.

The stop bar l may be supported in any desired manner either from the carriage or the frame of the machine. The drawings show a bar such as used upon the well known Royal typewriter and it is held at its ends in the side bars it of the carriage. rlhe same nuts B which hold the bar in position also afford means for holding the arms C which pivotally support the paper table. So far as the invention is concerned, however, it is immaterial whether the bar is supported in this or any other desired manner. lin fact the bar itself may be straight or circular and vary in any preferred manner so long as it has grooves on the opposite sides thereof for the reception of the stops.

rlhese grooves 2 will extend across both. sides of the bar and may also extend across the top, although this is not usual nor necessary. The stop itself is shown as a whole in Figure l and comprises a body portion 3 provided with a iinger opening l near the top thereof, and having two legs 5 and 6 which engage the grooves 2. The inner corners of the legs are beveled at 7 and 8 to facilitate the ready positioning of the stops on the bar. The outer edge of the leg 5 is beveled as shown at 9 and the leg 6 will have its outer edge beveled at 9 on the reverse side. This enables the stop to be placed with either side forward and the bevel will permit the cooperating stop to be actuated a second time without interfering with the stop with which it has just contacted.

The stop as thus far described is old, but a stop thus constructed would not be held in place against accidental displacement unless it fit the grooves so tightly as to be diticult to place in position. A holding spring linger is therefore provided which is stamped out of the metal of the leg 5 by what is termed a part piercing operation. This spring finger 10 remains connected to the leg of the stop at 1l at which point it is bent outward, while the remainder of the body of the finger lies in a plane parallel with the leg of the stop and closely adjacent thereto.

The lower end of this spring finger is tapered, and immediately adjacent the lower end it is provided with an enlarged rounded portion 12. When the stop is placed on the bar, this portion comes into gni engagement with the side of the bar and is eammed outwardly, but as soon as it passes below the under side of the bar, its inherent resilience causes the rounded portion l2 to spring under the loiver edge of the bar and hold the stop against accidental displacement. .it can be removed readily, however, by a direct upward pull on the stop, since the rounded portion l2 Will be readily camined outwardly.

lt will be evident that l have provided a unitary stop of simple eonstruetion which can he made at a single operation and whieh combines both the stop and retaining means in one integral structure. While illustrated and described in connection with a tabulating stop for typewriting machines, it is obvious that it is capable of use wherever a stop member of similar type is desired; in adding machines,*and other machines having relative traveling movement between tivo parts Where it is desired to provide stops for limiting said traveling movement at, predetermined points.

Stops so designed can be manufactured at a reduced cost and are of considerably increased durability and are less inclined to rattle or cause noises during the operation of the Carriage.

It is contemplated when desired to use an integral resilient holding linger in each of the legs of the stop.

ltis therefore understood that the invention is to be regarded as limited only by the scope of the appended claims.

raadsliel claim as my invention:

l. A carriage stop comprising a body portion, legs extending therefrom, and an integral resilient holding' linger stamped out of one of said legs and extending longitudinally thereof.

2. A carriage stop comprising a body portion, legs extending therefrom, and an integral resilient holding finger stamped out of one of said legs and having an enlarged portion near its free end.

3. A Carriage stop comprising a body portion, legs extending therefrom, and an integral resilient holding finger pressed out of one of said legs and extending longitudinally thereof, said finger remaining Connected to the leg at one end and having the greater portion thereof lying in a plane closely adjacent the plane of the leg.

la ln stop mechanism for typewriting machines, the combination of a grooved stop bar, a stop having a body and legs to fit said grooves, and an integral resilient liuger pressed out of one of said legs and having an enlarged portion near its free end to engage under the edge of the bar when the stop is positioned.

5. A carriage stop comprising a body portion, legs extending therefrom, and integral resilient holding fingers pressed out of one or both legs and extending longitudinally thereof.

In testimony whereof, I have hereunto subscribed my name.

BERNARD J. DOVVD. 

